If you've seen a grown adult in full kit, pedaling furiously in their garage while staring at a cartoon avatar climbing a fictional volcano, there's a good chance you've witnessed Zwift. It looks strange from the outside. It's also the single biggest reason a lot of people stick with indoor training instead of quitting by week two.

The Basic Idea

Zwift is an app that turns your indoor ride into a game. Your smart trainer (or a regular trainer with a separate power/speed sensor) sends your real effort to the app, and that effort moves your avatar through a virtual world — climbing hills, drafting behind other riders, racing up famous routes. Pedal harder, your avatar goes faster. Hit a virtual climb, your trainer automatically increases resistance to match, so the "hill" is a real hill in your legs, not just on screen.

You're not riding alone, either — other real people are in the same virtual world at the same time, which is the part that turns a solo trainer session into something closer to a group ride.

What You Can Actually Do On It

  • Free ride: pick a route, ride at your own pace, no pressure
  • Structured workouts: follow a specific interval session, with the trainer adjusting resistance automatically for each interval
  • Group rides: join a scheduled ride with a pace group, similar to a real group ride
  • Races: compete against other riders in real time, sorted roughly by category

What You Need to Use It

  • A smart trainer (or any trainer plus a separate speed/power sensor)
  • A device to run it on — phone, tablet, laptop, or a dedicated TV box
  • A Bluetooth or ANT+ connection between your trainer and that device

That's it. No special bike required beyond whatever's already clipped into your trainer.

Is It the Only Option?

No, and it's worth knowing that before you assume Zwift is mandatory. A few other platforms exist, and they generally fall into two camps:

Game-like platforms, similar to Zwift, with their own virtual worlds, group rides, and social features — differing mainly in graphics, route selection, and community size.

Training-focused platforms, which drop the game layer entirely in favor of structured workouts and detailed performance data — a better fit if you're training toward a specific goal and have zero interest in racing strangers up a digital mountain.

Most platforms in either category work with the same smart trainers, so picking a trainer doesn't lock you into a specific app.

Do You Actually Need One of These?

Not strictly — you can ride a trainer with just a workout timer and sheer willpower. Most people don't, because staring at a wall for 45 minutes has a way of making even short sessions feel endless. A platform gives you something to focus on other than the clock, and for a lot of riders, that's the difference between "I ride indoors three times a week" and "I own a trainer that I used twice in October."

Next up: figuring out what device to actually run it on. Apple TV vs PC vs Tablet for Zwift →